CAS : 999-97-3
ProductName : Hexamethyldisilazane
| Section 1 - Chemical Product | |
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MSDS Name: 1 1 1 3 3 3-Hexamethyldisilazane 98% Material Safety Data Sheet Synonym:Bis(trimethylsilyl)amine; HMDS; 1,1,1-Trimethyl-N-(trimethylsilyl)silanamine |
| Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS | ||
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CAS:999-97-3 content:98% EINECS:213-668-5 Hazard Symbols: F C Risk Phrases: 11 18 36/37/38 |
| Section 3 - HAZARDS IDENTIFICATION | |
| EMERGENCY OVERVIEW Highly flammable. In use, may form flammable/explosive vapour-air mixture. Irritating to eyes, respiratory system and skin.Moisture sensitive.Corrosive. Potential Health Effects Eye: Causes eye burns. Skin: Harmful if absorbed through the skin. Causes skin burns. Ingestion: May cause severe gastrointestinal tract irritation with nausea, vomiting and possible burns. May be harmful if swallowed. Inhalation: May cause irritation of the respiratory tract with burning pain in the nose and throat, coughing, wheezing, shortness of breath and pulmonary edema. Inhalation may be fatal as a result of spasm, inflammation, edema of the larynx and bronchi, chemical pneumonitis and pulmonary edema. Chronic: No information found. |
| Section 4 - FIRST AID MEASURES | |
| Eyes: Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately. Skin: Get medical aid. Immediately flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Ingestion: Do not induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately. Inhalation: Get medical aid immediately. Remove from exposure and move to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Notes to Physician: Treat symptomatically and supportively. |
| Section 5 - FIRE FIGHTING MEASURES | |
| General Information: As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Vapors can travel to a source of ignition and flash back. Flammable liquid and vapor. Extinguishing Media: Do NOT use water directly on fire. Use foam, dry chemical, or carbon dioxide. |
| Section 6 - ACCIDENTAL RELEASE MEASURES | |
| General Information: Use proper personal protective equipment as indicated in Section 8. Spills/Leaks: Absorb spill with inert material (e.g. vermiculite, sand or earth), then place in suitable container. Clean up spills immediately, observing precautions in the Protective Equipment section. Scoop up with a nonsparking tool, then place into a suitable container for disposal. Remove all sources of ignition. |
| Section 7 - HANDLING and STORAGE | |
| Handling: Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use only in a well-ventilated area. Use spark-proof tools and explosion proof equipment. Avoid breathing dust, vapor, mist, or gas. Do not get in eyes, on skin, or on clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Take precautionary measures against static discharges. Keep away from heat, sparks and flame. Do not ingest or inhale. Use only in a chemical fume hood. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames. Storage: Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a cool, dry place. Keep container closed when not in use. Store in a tightly closed container. Flammables-area. |
| Section 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION | |
| Engineering Controls: Use process enclosure, local exhaust ventilation, or other engineering controls to control airborne levels below recommended exposure limits. Exposure Limits CAS# 999-97-3: Russia: 2 mg/m3 TWA Personal Protective Equipment Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure. Respirators: Follow the OSHA respirator regulations found in 29 CFR 1910.134 or European Standard EN 149. Use a NIOSH/MSHA or European Standard EN 149 approved respirator if exposure limits are exceeded or if irritation or other symptoms are experienced. |
| Section 9 - PHYSICAL AND CHEMICAL PROPERTIES | |
| Physical State: Liquid Color: clear, colorless Odor: None reported. pH: Not available. Vapor Pressure: 20 mm Hg @ 20 C Viscosity: Not available. Boiling Point: 125 deg C Freezing/Melting Point: Not available. Autoignition Temperature: 379 deg C ( 714.20 deg F) Flash Point: 8 deg C ( 46.40 deg F) Explosion Limits, lower: 0.8 Explosion Limits, upper: 16.3 Decomposition Temperature: Not available. Solubility in water: Insoluble in water. Specific Gravity/Density: 0.77 Molecular Formula: C6H19NSi2 Molecular Weight: 161.3107 |
| Section 10 - STABILITY AND REACTIVITY | |
| Chemical Stability: Stable under normal temperatures and pressures. Conditions to Avoid: Mechanical shock, incompatible materials, ignition sources, temperatures above 150C, exposure to moist air or water. Incompatibilities with Other Materials: Strong oxidants and strong acids. May decompose upon exposure to moist air or water. When heated to temperatures above 150 C in the presence of air, hexamethyldisilazane can form formaldehyde vapors. Hazardous Decomposition Products: Nitrogen oxides, carbon monoxide, carbon dioxide, silicon dioxide, formaldehyde. Hazardous Polymerization: Has not been reported. |
| Section 11 - TOXICOLOGICAL INFORMATION | |
| RTECS#: CAS# 999-97-3: JM9230000 LD50/LC50: CAS# 999-97-3: Dermal, guinea pig: LD50 = 1 mL/kg; Draize test, rabbit, skin: 500 uL Severe; Inhalation, mouse: LC50 = 12 gm/m3/2H; Inhalation, rat: LC50 = 8700 mg/m3/4H; Oral, mouse: LD50 = 850 mg/kg; Oral, rabbit: LD50 = 1100 mg/kg; Oral, rat: LD50 = 850 mg/kg; Skin, rabbit: LD50 = 710 uL/kg. Carcinogenicity: 1,1,1,3,3,3-HEXAMETHYLDISILAZANE - Not listed by ACGIH, IARC, or NTP. Other: See actual entry in RTECS for complete information. |
| Section 12 - ECOLOGICAL INFORMATION | |
| Section 13 - DISPOSAL CONSIDERATIONS | |
| Dispose of in a manner consistent with federal, state, and local regulations. |
| Section 14 - TRANSPORT INFORMATION | |
| IATA Shipping Name: FLAMMABLE LIQUID, N.O.S.* Hazard Class: 3 UN Number: 1993 Packing Group: II IMO Shipping Name: FLAMMABLE LIQUID, N.O.S. Hazard Class: 3.2 UN Number: 1993 Packing Group: II RID/ADR Shipping Name: FLAMMABLE LIQUID, N.O.S. Hazard Class: 3 UN Number: 1993 Packing group: II |
| Section 15 - REGULATORY INFORMATION | |
| European/International Regulations European Labeling in Accordance with EC Directives Hazard Symbols: F C Risk Phrases: R 11 Highly flammable. R 18 In use, may form flammable/explosive vapour-air mixture. R 36/37/38 Irritating to eyes, respiratory system and skin. Safety Phrases: S 7/8 Keep container tightly closed and dry. S 9 Keep container in a well-ventilated place. S 16 Keep away from sources of ignition - No smoking. S 26 In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S 29 Do not empty into drains. S 36/39 Wear suitable protective clothing and eye/face protection. S 37/39 Wear suitable gloves and eye/face protection. WGK (Water Danger/Protection) CAS# 999-97-3: 1 Canada CAS# 999-97-3 is listed on Canada's DSL List. CAS# 999-97-3 is not listed on Canada's Ingredient Disclosure List. US FEDERAL TSCA CAS# 999-97-3 is listed on the TSCA inventory. |
Hexamethyldisilazane
China (Mainland)] 
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